<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>filter</title>
</head>
<body>
    {{text|lower}}
    {{html_content|safe}}
    {{html_content2}}
    {{list|join(",")}}
    {{name|double}}
    {{current_date|format_date}}
    {{word|prefix("加前缀")|suffix("加后缀")}}
</body>
</html>